"Mike Wallace is here"

Four words that struck terror into the hearts of shady businessmen and corrupt politicians – "Mike Wallace is here" – also comprise the title of a new documentary that depicts the dramatic life and career of the legendary CBS News correspondent, whose no-holds-barred interview style and indefatigable showmanship helped make "60 Minutes" must-see TV. Rita Braver talks with filmmaker Avi Belkin (who was granted unprecedented access to CBS News' archives), and with Mike's son, "Fox News Sunday" anchor Chris Wallace, about building a career in the footsteps of a giant.